Bertolini, T, Rubino, M, Lubritto, C, D'Onofrio, A, Marzaioli, F, Passariello, I and Terrasi, F (2005) Optimized sample preparation for isotopic analyses of CO2 in air: systematic study of precision and accuracy dependence on driving variables during CO2 purification process. Journal of Mass Spectrometry, 40 (8). 1104 - 1108. ISSN 1076-5174

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A systematic analysis of efficiency, reproducibility and accuracy of cryogenic purification of CO2 from air samples for isotopic analyses is presented. The technical characteristics of the cryogenic line are given in detail. To study the cryogenic process, three different operating parameters are considered: flow rate of the gas entering the line, pressure of the gas in the line, and CO2‐trap shape. Experimental results demonstrate that efficiency, reproducibility and accuracy strongly depend on the CO2trap shape. Moreover, a dependence of reproducibility and accuracy on the flow rate of the gas is found, but not on its pressure. High precision (≤0.02‰ for δ13C and ≤0.05‰ for δ18O) and good accuracy (<0.09‰ for δ13C and <0.14‰ for δ18O) is achieved after applying the N2O correction.

Item Type: Article
Uncontrolled Keywords: stable isotopes, cryogenic purification of CO2, gas-isotope ratio mass spectrometry
Subjects: G Geography. Anthropology. Recreation > G Geography (General)
Divisions: Faculty of Natural Sciences > School of Geography, Geology and the Environment
Related URLs:
Depositing User: Symplectic
Date Deposited: 10 Aug 2018 15:04
Last Modified: 29 Jul 2019 11:21

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